<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>基础选择器之标签选择器</title>
    <!-- 标签选择器 -->
    <style>
        p {
            color: blue;
        }
        h3 {
            color: brown;
        }
    </style>
</head>
<body>
    <p>男生</p>
    <p>男生</p>
    <p>男生</p>
    <h3>女生</h3>
    <h3>女生</h3>
    <h3>女生</h3>

</body>
</html>